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In the hybrid power system based on double-input buck converter and power management strategy which has been put forward, we can keep the system working under suitable mode. But when the two IGBT switches at the same time, due to the reverse bias voltage, the flywheel diode wiil cut off. The commercial power current must flow through the photovoltaic that wiil affect measurement of Photovoltaic current seriously. Interleaved dual-edge modulation and inter-lock can solve the problem, theoretical analysis wiil be listed to prove the consistency of the two method. The simulation results of interleaved dual-edge modulation based on Matlab/Simulink model have confirmed the effectiveness. [ABSTRACT FROM AUTHOR]